leased the Aircraft to a third party lessee, an amount equal to the excess of the aggregate remaining unpaid payments of Basic Rent due and owing through the scheduled Expiration Date specified in the Lease Supplement, over the actual lease rentals collected by Lessor from such third party lessee as of the date of adjudication under this Section 18(d); except that Lessee shall be required to pay to Lessor an amount equal to the full Casualty Value if Lessee does not voluntarily return the Aircraft to Lessor within such ten (10) day notice period at the location designated by Lessor or other location mutually agreed to between Lessor and Lessee, together with interest, to the extent permitted by Applicable Law, at the Interest Rate on the amounts required to be paid hereunder, from such payment date specified pursuant to this Section 18(d) to the date of actual payment of such amount. Upon return of the Aircraft, Lessor shall exercise its reasonable best efforts to lease the Aircraft to a third party lessee as